docs: def convert(self, value, param, ctx):
          """ Try to find correct disk image regarding version. """
          self.gandi = ctx.obj
          # remove deprecated * prefix
          choices = [choice.replace('*', '') for choice in self.choices]
          value = value.replace('*', '')
          # Exact match
          if value in choices:
              return value
  
          # Try to find 64 bits version
          new_value = '%s 64 bits' % value
          if new_value in choices:
              return new_value
  
          # Try to find without specific bits version
          p = re.compile(' (64|32) bits')
          new_value = p.sub('', value)
          if new_value in choices:
              return new_value
  
          self.fail('invalid choice: %s. (choose from %s)' %
                    (value, ', '.join(self.choices)), param, ctx)